Nanna's needs - Part 2

Nanna led me out of my bedroom and along the landing to hers. I hadn't been in there in a while, it was still as it was since the last time I'd slept in there. Her big king-size bed against the wall oposite the window that always caught the moonlight glow, just as it was this evening. Scatter pillows adorning the bed.
She guided me to what was traditionally, her side of this huge bed and beckoned me, without saying anything to sit. Nanna then walked over to the window, drawing back the curtaind slightly to let a little more moonlight seep through.
As she walked back, her slender body was once again silhouetted against the night glow.
She was nearly sixty and kept herself quite fit, with no extra weight and looked a true "GILF".
Nanna knew I wasn't overly experienced in the sex department, only having a couple of girls, so she endeavoured to take the lead.
She stood before me now, I could feel myself trembling with anticipation as to, what to expect.
Nanna grabbed my hand and guided it to her silky nightie cord, wrapping my fingers around it. I knew if I pulled it there would be no going back.
I paused for a moment, contemplating what would happen if we were caught, but the need to go on was greater and so, I gently pulled the silken cord.
Her nightie opened, partially revealing her breast. I gulped as the thought of her sexy body was being slowly given to me.
I tenderly placed my hands inside and cupped her beautiful breast, feeling her nipples stiffen as I did so. She then gently guided me backwards, as she straddled me. I wasn't hard at this point, but really wanted to be. Nanna somehow sensed this and started to glide over my groin with her labia. My Nanna was seductively dry humping me. The feeling certainly made my manhood start to twitch, making my cock want to burst out of my shorts.
Nanna's silken panties were now getting wet.
"Nanna needs your cock John!" Shd whispered in my ear, and reached down grasping my semi-erection and proceeded to masturbate me to a full-on seven-and-half inch hard erection.
She didn't wast any time sliding her damp panties over, so she could lower herself on to my throbbing cock.
Showing her prowess, she did it slowly and seductively, teasing the head of my penis until she was ready to take it all.
And once she was, I don't know if it was because she hadn't had sex in such a long time, but, she rode me like a frantic cowgirl. Her sexual appitite was immense. She wanted it in all sorts of positions, until I finally gave her my full load doggy-style, where we collapsed in a sex-indused sweaty heap.
We both lay there for a while, until we had to clean ourselves up.
Afterwards, I returned to my bedroom, and she, hers.
Nothing was said about what we'd done, but it did happen a handful more times, until I completed my first college year, as it was placement after that.
At least, Nanna's needs were forfilled in the time I was there.
"Thankyou Nanna!"